<?php
/**
 * wordpress 插件
 * 
 * @copyright  Copyright (c) 2013 www.Mediad.cn
 * @license    New BSD License
*/
class Mediad2_Utility_WordpressPlus
{
	
	/**
	 * posts内容转换成html格式
	 * @param 正文 $pee
	 * @param 空格 $br
	 * @return string|mixed
	 */
	function wpautop($pee, $br = true) {
		$pre_tags = array();
	
		if ( trim($pee) === '' )
			return '';
	
		$pee = $pee . "\n"; // just to make things a little easier, pad the end
	
		if ( strpos($pee, '<pre') !== false ) {
			$pee_parts = explode( '</pre>', $pee );
			$last_pee = array_pop($pee_parts);
			$pee = '';
			$i = 0;
	
			foreach ( $pee_parts as $pee_part ) {
				$start = strpos($pee_part, '<pre');
	
				// Malformed html?
				if ( $start === false ) {
					$pee .= $pee_part;
					continue;
				}
	
				$name = "<pre wp-pre-tag-$i></pre>";
				$pre_tags[$name] = substr( $pee_part, $start ) . '</pre>';
	
				$pee .= substr( $pee_part, 0, $start ) . $name;
				$i++;
			}
	
			$pee .= $last_pee;
		}
	
		$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
		// Space things out a little
		$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|noscript|samp|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
		$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
		$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
		$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
		if ( strpos($pee, '<object') !== false ) {
			$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
			$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
		}
		$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
		// make paragraphs, including one at the end
		$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
		$pee = '';
		foreach ( $pees as $tinkle )
			$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
		$pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
		$pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);
		$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
		$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
		$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
		$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
		$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
		$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
		if ( $br ) {
			$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', '_autop_newline_preservation_helper', $pee);
			$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
			$pee = str_replace('<WPPreserveNewline />', "\n", $pee);
		}
		$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
		$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
		$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
	
		if ( !empty($pre_tags) )
			$pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee);
	
		return $pee;
	}
}

